package com.zhilingshenghuo.app.zhly;

import android.app.Activity;
import android.os.Bundle;

import androidx.annotation.Nullable;

import java.util.Random;

public class Test extends Activity {

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        Random random = new Random();
        int index = random.nextInt(4);
    }
}
